chore: 添加虚拟环境到仓库

- 添加 backend_service/venv 虚拟环境
- 包含所有Python依赖包
- 注意：虚拟环境约393MB，包含12655个文件

backend_service/venv/lib/python3.13/site-packages/pyasn1_modules/rfc5649.py

@@ -0,0 +1,33 @@
+# This file is being contributed to pyasn1-modules software.
+#
+# Created by Russ Housley.
+#
+# Copyright (c) 2019, Vigil Security, LLC
+# License: http://snmplabs.com/pyasn1/license.html
+#
+# AES Key Wrap with Padding
+#
+# ASN.1 source from:
+# https://www.rfc-editor.org/rfc/rfc5649.txt
+
+from pyasn1.type import univ
+
+from pyasn1_modules import rfc5280
+
+
+class AlgorithmIdentifier(rfc5280.AlgorithmIdentifier):
+    pass
+
+
+id_aes128_wrap = univ.ObjectIdentifier('2.16.840.1.101.3.4.1.5')
+
+id_aes192_wrap = univ.ObjectIdentifier('2.16.840.1.101.3.4.1.25')
+
+id_aes256_wrap = univ.ObjectIdentifier('2.16.840.1.101.3.4.1.45')
+
+
+id_aes128_wrap_pad = univ.ObjectIdentifier('2.16.840.1.101.3.4.1.8')
+
+id_aes192_wrap_pad = univ.ObjectIdentifier('2.16.840.1.101.3.4.1.28')
+
+id_aes256_wrap_pad = univ.ObjectIdentifier('2.16.840.1.101.3.4.1.48')